I sometimes do respond to comments but it's circumstantial. I despise trash talk, racism, swearing, spam, etc so in that case I try to kill their enthusiasm by writing back random stuff, funny things anything to make them feel awkward and leave them without responses. It normally kills the conversation quite quickly. On the other hand I enjoy a good off-poker-topic conversation with other genuinely nice people, and it's how I made friends. I like to joke around and sing along to lyrics that apply to certain situations and make others less tense so that everyone enjoys it. Some never do, that's life. But for some I make their day if they had a horrible day or something bad happened to them, or I can team up with someone to shut some racists up, and that's an achievement in itself. In GG's case I use a lot the thank you and sorry emojis. Why not be nice and respectful to someone whenever you can, right? Particularly when they have already donated (donated sounds nicer) you their hard earned money?